
System Synergy: Tier-1 alternative for VAV controllers.
Vivid 4" Display: Premium color UI for branded VAV boxes.
7-Day Agile UI: Custom branding in one week, zero R&D.
Non-polar PLC: Error-proof 2-wire "Plug & Play" setup.
Open Hardware: Escape locked-in brand ecosystems.
HD Monitoring: Real-time CO2, airflow, and temp data.
The Saswell 4-inch Color PLC HMI is a dedicated interactive terminal engineered to complement our VAV controller series. It is not a standalone universal display, but a core component of our open-architecture VAV strategy. By pairing this HMI with our controllers, OEMs can deliver a professional, branded solution that rivals Siemens, Johnson, or Honeywell in performance while offering far greater flexibility in hardware selection and visual identity.

Exclusive System Integration
Deeply optimized communication protocol ensures lag-free interaction with our VAV controllers.
Rapid Brand Empowerment
7-day UI turnaround allows you to market a fully branded HVAC solution under your own name.
Error-Proof Connectivity
Non-polar 2-wire PLC technology ensures the HMI and controller connect seamlessly without polarity risks.
Advanced Data Visualization
Provides clear, HD feedback for hospital isolation rooms and lab fume hoods.
Strategic Flexibility
Empowers you to use 0-10V universal actuators while maintaining a high-end, unified system appearance.
·Power supply: 100~240VAC 50/60Hz
·Standby Power Consumption:2W
·Display accuracy:0.1C
·Temperature setting step:0.5C
·Communication:Modbus/ 24VDC-PLC
·Displayed temperature range: 0~70C
·Operating temperature range: 0~50C
·Temperature setting range: 5~35C
·1Prating:IP21
·Dimensions: 86*86*11mm
The premier choice for VAV OEMs seeking to upgrade restrictive Tier-1 displays in high-spec projects. It is essential for hospital isolation rooms, professional laboratories, and premium office zoning where technical reliability and distinct brand identity are paramount.
We provide comprehensive OEM empowerment to ensure your brand leads the market with professional technical reliability.
7-Day Agile Customization
Rapid UI and language prototyping for unique branded experience.
Professional Tech Support
Direct R&D access for seamless logic and PID system integration.
Global Warranty Service
Reliable technical response and hardware coverage worldwide.
This HMI is a dedicated interactive terminal engineered exclusively for our VAV controller series.
It utilizes a specialized PLC protocol for deep data synchronization; therefore, it cannot be directly connected to third-party controllers.
It uses Non-polar 2-wire PLC technology, handling both communication and power over just two wires.
This design eliminates the need for a separate power cable, as the HMI draws power directly from the controller.
We provide rapid localization support, delivering your exclusive language firmware in just 7 working days.
Whether you need English, Spanish, Arabic, or any other language, we can deploy it quickly through our agile customization process.
We offer two tiers: Lightweight Customization and Full Customization.
Lightweight: Includes main UI style adaptation, brand logo integration, and standard 485/BACnet support.
Full Customization: Supports complete UI reconstruction (all menu levels), exclusive ID/mold modifications, customized function development, and other protocols.
Lightweight customization (including language, logo, and main UI) features a 7-working-day agile delivery.
Full customization involving specific function development is generally delivered within 60 days.
It is an error-proof solution; there is no polarity requirement when connecting, which prevents terminal burnout due to wiring errors.
This technology simplifies installation and reduces labor costs by more than 50%.
Yes. Our PLC technology runs high-speed data over standard 2-core cables, allowing a premium color upgrade without re-cabling.
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info@saswell.com
